pywikibot.DataSite.mergeItem ignore_conflicts is str
pywikibot.DataSite.mergeItem ignore_conflicts is str

As documented in
https://phabricator.wikimedia.org/diffusion/EWBA/browse/master/repo/includes/Api/MergeItems.php,
the ignore_conflicts parameter is a list of strings, not a bool.

Bug: T138289
Change-Id: Ia759640891a564699553ad334a9b3b0005814b82

PersianWikipedia/pywikibot-core,happy5214/pywikibot-core,npdoty/pywikibot,wikimedia/pywikibot-core,npdoty/pywikibot,hasteur/g13bot_tools_new,magul/pywikibot-core,hasteur/g13bot_tools_new,jayvdb/pywikibot-core,happy5214/pywikibot-core,jayvdb/pywikibot-core,Darkdadaah/pywikibot-core,magul/pywikibot-core,Darkdadaah/pywikibot-core,hasteur/g13bot_tools_new,wikimedia/pywikibot-core